viii BYZANTINE CHURCHES
filled the city but a small remnant survives. Earthquakes, fires, pillage, neglect, not to speak of the facility with which a Byzantine structure could be shorn of its glory, have swept the vast majority off the face of the earth, leaving not a rack behind. In most cases even the sites on which they stood cannot be identified. The places which knew them know them no more. Scarcely a score of the old churches of the city are left to us, all with one exception converted into mosques and sadly altered. The visitor must, therefore, be prepared for disappointment. Age is not always a crown of glory; nor does change of ownership and adaptation to different ideas and tastes necessarily conduce to improvement. We are not looking at flowers in their native clime or in full bloom, but at flowers in a herbarium so to speak, or left to wither and decay. As we look upon them we have need of imagination to see in faded colours the graceful forms and brilliant hues which charmed and delighted the eyes of men in other days.
In the preparation of this work I have availed myself of the aid afforded by previous students in the same field of research, and I have gratefully acknowledged my debt to them whenever there has been occasion to do so. At the same time this is a fresh study of the subject, and has been made with the hope of confirming what is true, correcting mistakes, and gathering additional information. Attention has been given to both the history and the architecture of these buildings. The materials for the former are, unfortunately, all too scanty. No continuous records of any of these churches exist. A few incidents scattered over wide tracts of time constitute all that can be known. Still, disconnected incidents though they be, they give us glimpses